The top of the tree should be decorated with a large bow made from a thick ribbon, preferably red or green in color. The bow should be made from 2-3 loops of ribbon, with each loop being 4-6 inches in diameter. The loops should be evenly spaced out around the top of the tree and tied in the center with a smaller piece of ribbon. Once the loops are tied, you should fluff the bow so that it's nice and full. Finally, you can add small ornaments or other decorations to the bow to give it a festive touch.